CN204067000U - A kind of main insulation structure of EHV transformer - Google Patents
A kind of main insulation structure of EHV transformer Download PDFInfo
- Publication number
- CN204067000U CN204067000U CN201420486015.9U CN201420486015U CN204067000U CN 204067000 U CN204067000 U CN 204067000U CN 201420486015 U CN201420486015 U CN 201420486015U CN 204067000 U CN204067000 U CN 204067000U
- Authority
- CN
- China
- Prior art keywords
- cushion block
- insulation structure
- square ring
- paper circle
- tension coil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000009413 insulation Methods 0.000 title claims abstract description 26
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 24
- 230000003068 static effect Effects 0.000 claims abstract description 13
- 229910052742 iron Inorganic materials 0.000 claims abstract description 12
- 239000000123 paper Substances 0.000 claims description 19
- 239000011111 cardboard Substances 0.000 claims description 10
- 238000010030 laminating Methods 0.000 claims description 3
- 238000004804 winding Methods 0.000 abstract description 7
- 239000000463 material Substances 0.000 abstract description 4
- 230000037303 wrinkles Effects 0.000 abstract description 4
- 230000005684 electric field Effects 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 3
- 238000004088 simulation Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
Landscapes
- Insulating Of Coils (AREA)
Abstract
The main insulation structure of EHV transformer of the present utility model, is characterized in that: high-tension coil end arranges static board, arranges core insulation structure between static board and iron yoke; Core insulation structure comprises paper circle and cushion block, and several paper circles and cushion block interval are arranged, and the internal diameter of paper circle is less than the internal diameter of cushion block, and the external diameter of paper circle is less than the external diameter of cushion block, adds the creepage distance of coil to iron yoke.The beneficial effects of the utility model are, 1. by adopting little paper circle at core insulation, big cushion block structure, increasing the creepage distance of winding to iron yoke, thus can reduce the height of window unshakable in one's determination, reduce material cost; 2. the paper circle cushion block chamfering in square ring radian, produces wrinkle and damages square ring when preventing winding stressed, improve neighbouring electric-field strength distribution, improve transformer safety reliability of operation.
Description
Technical field
The utility model belongs to field transformer, relates to a kind of main insulation structure of EHV transformer.
Background technology
1. present stage, EHV transformer Main Insulation Structure of Electric, in order to meet insulation level, usually still adopting increase core insulation distance to increase creepage distance, meeting insulation level, add window height unshakable in one's determination, add material cost.2. when winding is stressed, the seamed edge of the core insulation above square ring is pressed onto " radian " of square ring, makes square ring produce wrinkle and has damaged the electric property of square ring, to know clearly potential safety hazard to transformer belt.
Summary of the invention
The utility model, in order to make up the deficiencies in the prior art, provides that a kind of structure is simple, easy to use, cost is low, prevents the main insulation structure of the EHV transformer damaging square ring.
The utility model is achieved by the following technical solution:
The main insulation structure of EHV transformer of the present utility model, is characterized in that: high-tension coil end arranges static board, arranges core insulation structure between static board and iron yoke; Core insulation structure comprises paper circle and cushion block, and several paper circles and cushion block interval are arranged, and the internal diameter of paper circle is less than the internal diameter of cushion block, and the external diameter of paper circle is less than the external diameter of cushion block, adds the creepage distance of coil to iron yoke.
High-tension coil lower end inside is surrounded by square ring, square ring encases static board, first cushion block and first paper circle from inner side simultaneously, the outside flange corner in square ring lower end is near first cushion block, flange corner is circular arc chamfering, correspondingly with square ring contact position on first cushion block is provided with circular arc chamfering.
Outside high-tension coil and inner side is respectively equipped with some layers of insulating board, is lined with stay between adjacent two layers insulating board; The inner side and outer side of high-tension coil end is respectively equipped with gear oiled cardboard, and gear oiled cardboard laminating high-tension coil, the gear oiled cardboard inside high-tension coil is positioned at the outside of square ring.
The beneficial effects of the utility model are, 1. adopt little paper circle by core insulation, big cushion block structure, increase the creepage distance of winding to iron yoke, thus can reduce the height of window unshakable in one's determination, reduce material cost; 2. the paper circle cushion block chamfering in square ring radian, produces wrinkle and damages square ring when preventing winding stressed, improve neighbouring electric-field strength distribution, improve transformer safety reliability of operation.
Accompanying drawing explanation
Lower Fig. 1 is old axis of no-feathering cross section partial schematic diagram; Fig. 2 is new construction shaft section partial schematic diagram.
In figure: 1, square ring, 2, first cushion block, 3, cushion block, 4, simulation creepage distance, 5, high-tension coil, 6, iron yoke, 7 gear oiled cardboards, 8 stays, 9 insulating boards, 10 paper circles, 11 static boards.
Embodiment
Accompanying drawing is a kind of specific embodiment of the present utility model.
The main insulation structure of EHV transformer of the present utility model, high-tension coil 5 end arranges static board 11, arranges core insulation structure between static board and iron yoke 6; Core insulation structure comprises paper circle 10 and cushion block 3, and several paper circles and cushion block interval are arranged, and the internal diameter of paper circle is less than the internal diameter of cushion block, and the external diameter of paper circle is less than the external diameter of cushion block, adds the creepage distance of coil to iron yoke.
High-tension coil lower end inside is surrounded by square ring 1, square ring encases static board 11, first cushion block 2 and first paper circle from inner side simultaneously, the outside flange corner in square ring lower end is near first cushion block, flange corner is circular arc chamfering, correspondingly with square ring contact position on first cushion block is provided with circular arc chamfering.
Outside high-tension coil and inner side is respectively equipped with some layers of insulating board 9, is lined with stay 8 between adjacent two layers insulating board; The inner side and outer side of high-tension coil end is respectively equipped with gear oiled cardboard 7, and gear oiled cardboard laminating high-tension coil, the gear oiled cardboard inside high-tension coil is positioned at the outside of square ring.
High-tension coil is 500KV high-tension coil.
The symmetrical configuration at the upper and lower two ends of coil is arranged, and namely the upper and lower two ends of coil are all provided with static board, paper circle and cushion block.
Core insulation in Fig. 2, use little paper circle instead, big cushion block structure, by simulating creepage distance 4 in comparison diagram 1, is far longer than cushion block in the simulation creepage distance 4(Fig. 1 in Fig. 1 the same large with paper circle internal diameter, external diameter is equally large, creepage distance is shape substantially linearly), in Fig. 2, creepage distance extends to form curve to each paper circle place, increases the creepage distance of winding to iron yoke like this, thus the height of window unshakable in one's determination can be reduced, reduce material cost.2. cushion block 2 chamfering in square ring radian, produces wrinkle and damages square ring when preventing winding stressed, improve neighbouring electric-field strength distribution, improve transformer safety reliability of operation.
Claims (3)
1. a main insulation structure for EHV transformer, is characterized in that: high-tension coil end arranges static board, arranges core insulation structure between static board and iron yoke; Core insulation structure comprises paper circle and cushion block, and several paper circles and cushion block interval are arranged, and the internal diameter of paper circle is less than the internal diameter of cushion block, and the external diameter of paper circle is less than the external diameter of cushion block, adds the creepage distance of coil to iron yoke.
2. the main insulation structure of EHV transformer according to claim 1, it is characterized in that: high-tension coil lower end inside is surrounded by square ring, square ring encases static board, first cushion block and first paper circle from inner side simultaneously, the outside flange corner in square ring lower end is near first cushion block, flange corner is circular arc chamfering, correspondingly with square ring contact position on first cushion block is provided with circular arc chamfering.
3. the main insulation structure of EHV transformer according to claim 1 and 2, is characterized in that: outside high-tension coil and inner side is respectively equipped with some layers of insulating board, is lined with stay between adjacent two layers insulating board; The inner side and outer side of high-tension coil end is respectively equipped with gear oiled cardboard, and gear oiled cardboard laminating high-tension coil, the gear oiled cardboard inside high-tension coil is positioned at the outside of square ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420486015.9U CN204067000U (en) | 2014-08-27 | 2014-08-27 | A kind of main insulation structure of EHV transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420486015.9U CN204067000U (en) | 2014-08-27 | 2014-08-27 | A kind of main insulation structure of EHV transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204067000U true CN204067000U (en) | 2014-12-31 |
Family
ID=52208457
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420486015.9U Expired - Fee Related CN204067000U (en) | 2014-08-27 | 2014-08-27 | A kind of main insulation structure of EHV transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204067000U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107799283A (en) * | 2017-11-30 | 2018-03-13 | 国家电网公司 | End circle and its manufacture method of the cushion block with oblique angle |
| CN108922747A (en) * | 2018-07-17 | 2018-11-30 | 河南森源电气股份有限公司 | Current transformer |
-
2014
- 2014-08-27 CN CN201420486015.9U patent/CN204067000U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107799283A (en) * | 2017-11-30 | 2018-03-13 | 国家电网公司 | End circle and its manufacture method of the cushion block with oblique angle |
| CN108922747A (en) * | 2018-07-17 | 2018-11-30 | 河南森源电气股份有限公司 | Current transformer |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203746634U (en) | Vertical magnetic shielding structure | |
| CN204067000U (en) | A kind of main insulation structure of EHV transformer | |
| CN103413655B (en) | Insulation resin amorphous alloy dry-type traction rectifier transformer | |
| CN204010983U (en) | A kind of new-type superhigh pressure indirect type outlet structure | |
| CN103996500A (en) | Winding type iron core and iron core reactor | |
| CN204732278U (en) | A kind of Cast Resin Dry-Type Transformer high-tension coil | |
| CN105405612A (en) | Transformer for high-voltage output | |
| CN202678070U (en) | Yoke shield of converter transformer and shielding structure of yoke shield | |
| CN206098119U (en) | Metallic glass transformer bearing structure | |
| CN203366928U (en) | Resin insulation amorphous alloy dry-type traction rectifier transformer | |
| CN205789454U (en) | A kind of 110kV transformer insulation structure | |
| CN106057441A (en) | Oil-immersed transformer body reinforcement structure capable of enhancing short-circuit withstand ability | |
| CN206282695U (en) | A kind of double-deck outsourcing silicon steel sheet bag amorphous iron core structure | |
| CN104505234A (en) | Winding reinforcing structure of distribution transformer with short-circuit-resisting capability | |
| CN203491069U (en) | Insulating end ring for resin pouring-type transformer high-voltage coil | |
| CN204632544U (en) | A kind of dry transformer high-tension coil insulation system | |
| CN204257369U (en) | A kind of dry-type power transformer | |
| CN204066993U (en) | A kind of amorphous alloy oil immersion type transformer skeleton | |
| CN203871166U (en) | High saturation flux density anti-resonance voltage transformer | |
| CN203386583U (en) | Winding assembly of 20kV dry-type electric transformer | |
| CN203983002U (en) | A kind of Improvement type transformer | |
| CN204178895U (en) | A kind of low-voltage coil structure of transformer | |
| CN203165640U (en) | Long-waist-shaped energy-saving transformer | |
| CN204088026U (en) | Medical transformer | |
| CN207082401U (en) | A kind of work mining transformer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141231 |